标签：ima ons opacity can 全局 ide his gif pac
监听标签的触摸/鼠标滑动事件，添加元素的切换动画，效果如下：
鼠标事件和触摸事件监听：
1 componentDidMount() { 2 var teachingReportDiv = document.getElementById("teachingReport") as HTMLElement; 3 teachingReportDiv.onmousedown = this.onMouseDown; 4 teachingReportDiv.onmouseup = this.onMouseUp; 5 teachingReportDiv.addEventListener(‘touchstart‘, this.onTouchStart, false); 6 teachingReportDiv.addEventListener(‘touchmove‘, this.onTouchMove, false); 7 teachingReportDiv.addEventListener(‘touchend‘, this.onTouchEnd, false); 8 }
触摸事件，不能HTMLElement.ontouchstart添加事件监听，可以EventListener或者在标签中添加
1 <div id="teachingReport" onTouchStart={(event) => this.onTouchStart(event)}/>
触摸事件有以下几个：
touchstart事件：手指触摸时候触发（支持多指触发）touchmove事件：手指在滑动的时候连续地触发。在这个事件发生期间，调用preventDefault()事件可以阻止滚动，当然也不能滥用否则会影响原有页面的上下滚动等。touchend事件：手指从屏幕上离开的时候触发touchcancel事件：当系统停止跟踪触摸的时候触发。关于这个事件的确切出发时间，文档中并没有具体说明。。。不建议使用添加全局字段：
1 onTouchStart = (event) => { 2 this.locationStartX = event.targetTouches[0].pageX; 3 } 4 onTouchMove = (event) => { 5 // event.preventDefault(); 6 this.locationEndX = event.targetTouches[0].pageX; 7 } 8 onTouchEnd = (event) => { 9 const locationChangedX = this.locationEndX < this.locationStartX; 10 if (Math.abs(locationChangedX) > 10) { 11 const isSlidingToRight=locationChangedX<0; 12 } 13 }
动画，可以通过state参数触发
1 <div className="reportContent-img" style={{ animation: this.state.selectTabIndex == 0 ? ‘showFromLeft 0.4s forwards‘ : ‘hideToLeft 0.2s forwards‘ }}></div>
动画数据参考：
1 //动画 2 @keyframes showFromLeft { 3 from { 4 opacity: 0; 5 transform: translateX(-100px); 6 } 7 to { 8 opacity: 1; 9 transform: translateX(0px); 10 } 11 } 12 @keyframes showFromRight { 13 from { 14 opacity: 0; 15 transform: translateX(100px); 16 } 17 to { 18 opacity: 1; 19 transform: translateX(0px); 20 } 21 } 22 @keyframes hideToLeft { 23 from { 24 opacity: 1; 25 transform: translateX(0px); 26 } 27 to { 28 opacity: 0; 29 transform: translateX(-100px); 30 } 31 } 32 @keyframes hideToRight { 33 from { 34 opacity: 1; 35 transform: translateX(0px); 36 } 37 to { 38 opacity: 0; 39 transform: translateX(100px); 40 } 41 }
标签：ima ons opacity can 全局 ide his gif pac
原文地址：https://www.cnblogs.com/kybs0/p/13218450.html
